## Research Abstracts Online

January - December 2011

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### University of Minnesota Twin Cities

College of Science and Engineering

Department
of Mechanical Engineering

# PI: Richard J. Goldstein, Associate Fellow

### Numerical Simulation of Thermal Convection at High Rayleigh Numbers

These researchers are interested in Rayleigh-Benard convection, which involves a horizontal layer of fluid heated from below and cooled from above. The researchers have done experimental work on this convection with constant wall temperature as the boundary condition. They are now validating this experimental data using the CFD software package FLUENT. Temperature variation along the confined geometry will be obtained from numerical results which will be used to calculate Nusselt number as a function of Rayleigh number. In order to extend the understanding of Rayleigh-Benard convection, another experiment will take place with uniform wall heat flux as the boundary condition. Results of this experiment will also be compared with the computational results obtained through CFD simulations. Once numerical data is validated with experiments, numerical datasets will be created for the geometrical cases that were not experimentally studied. Since all the numerical work will require turbulence modeling, FLUENT will be used for the simulations.

### Group Members

Kalyanjit Ghosh, Graduate Student

Yuli Kornblum, Collaborator

Kaustubh Kulkarni, Graduate Student

Rajat Mittal, Graduate Student

Rishabh Rajkumar Srivastava, Graduate Student

Matthew E. Stinson, Graduate Student